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摘要:
Wiener在控制论(Cybernetics)中强调了两大类控制对象: 机器与动物. 半个世纪以来, 机器控制领域已形成一套较为完备且先进的控制理论, 而在生物控制方面, 由于生物系统的特殊性和复杂性, 对生命的基本组成单位—细胞的控制仍然进展缓慢. 近年来, 随着合成生物学技术的发展, 基于细胞—计算机交互的胞外控制手段开始引起研究者们的关注, 为细胞控制带来了前所未有的机遇. 胞机交互的方式能够适应生物系统的特殊性, 发挥计算机控制的优势, 实现细胞的自动化实时控制, 为人类研究细胞内部基因调控机制与其他各项生命活动提供了大量的数据与方法支持. 本文根据目前基于胞机交互的细胞控制工作, 归纳与总结了胞机交互中常用的生物学工具以及控制算法, 分析了细胞控制的特殊性与难点, 指出研究实现细胞智能控制的可行性与重要性.
Abstract:Wiener emphasized two major categories of control objects in cybernetics: machines and animals. In the past half century, a relatively complete and advanced control theory has been formed in the field of machine control. However, due to the particularity and complexity of biological systems, the control of cell, the basic unit of life, is still progressing slowly. In recent years, with the development of synthetic biology tools, in silico control methods based on cell-computer interfacing has drawn researchers' attention, bringing unprecedented opportunities for cell control. These methods can adapt to the particularity of biological system, take advantages of in silico control, realize automatic real-time cell control and provide a large amount of data and methods for human research on endogenous gene regulation mechanism or other activities. Based on current progress, this review summarized the biological tools and control algorithms used in cell-machine interfacing, illustrated the particularities and difficulties and pointed out the feasibility and importance to achieve intelligent cell control.
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Key words:
- Cell-computer interfacing /
- feedback control /
- synthetic biology /
- artificial biosystem /
- optogenetics
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表 1 细胞控制常用控制算法优缺点比较
Table 1 Pros and cons of several control algorithms in cell control
控制算法 是否需要精确建模 优点 缺点 PID控制 否 稳定性好, 计算简便, 不依赖模型 在快速变化的、长时延的系统上效果较差 模型预测控制 是 适用于时变的、有时延的系统, 能够预测未来状态 计算复杂度高, 易受噪声影响, 建模过程繁琐 起停式控制 否 结构最简单方便 控制动作不连续, 容易造成系统振荡 ZAD控制 是 适用于时变的、有时延的系统, 减少了输入开关数量 在快速变化系统中的表现略逊于模型预测控制[20] -
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